physics

John H. Lawrence

John H. Lawrence is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand John H. Lawrence rather than just read about it. In short: John Hundale Lawrence (January 7, 1904 – September 7, 1991) was an American physicist and physician best known for pioneering the field of nuclear medicine. Background John Hundale Lawrence was born in Canton, South Dakota.

Key takeaways

John H. Lawrence belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect John H. Lawrence to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of John H. Lawrence from memory before moving on to harder problems.

Reference excerpt

John Hundale Lawrence (January 7, 1904 – September 7, 1991) was an American physicist and physician best known for pioneering the field of nuclear medicine.

Background John Hundale Lawrence was born in Canton, South Dakota. His parents, Carl Gustavus and Gunda Regina (née Jacobson) Lawrence, were both the offspring of Norwegian immigrants who had met while teaching at the high school in Canton, South Dakota, where his father was also the superintendent of schools. His brother was physicist Ernest O. Lawrence. He attended college at the University of South Dakota before getting his M.D. degree from Harvard Medical School. He was awarded a Guggenheim Fellowship in physics in 1957.

Career He had a long-term association with the University of California, Berkeley and worked at the Lawrence Berkeley National Laboratory. There he discovered treatments for leukemia and polycythemia by injecting infected mice with radioactive phosphorus derived from the cyclotron invented by his brother, the Nobel Laureate Ernest O. Lawrence. In 1936, he administered a dose of radiophosphorus to a 28-year-old leukemia patient, this being the first time that a radioactive isotope produced by the cyclotron being used to treat a human patient. Lawrence pioneered the usage of radioactive tracer techniques to study the impact of disease on metabolic processes. He also demonstrated that neutron beams were potentially more effective at battling cancerous cells than X-rays, and, in 1949, became the first physician to use a radioactively labelled noble gas for diagnostic purposes in humans. Lawrence's work with cancer patients attracted the interest of William Donner, a Philadelphia industrialist and philanthropist, whose son had died of cancer. Donner contributed funds for construction of Donner Laboratory, at the Northeast corner of the Berkeley Campus that was dedicated in 1942. In June of the same year, he married Amy McNear Bowles, daughter of George McNear Bowles, Sr. and Beatrice (Nickel) Bowles of San Francisco. John Lawrence received the Enrico Fermi Award in 1983. He received honorary degrees from the University of South Dakota, University of Bordeaux and from the Catholic University of America. He was awarded the Caldwell Medal of the American Roentgen Ray Society; the MacKenzie Davidson Medal of the British Institute of Radiology; a medal from Pope Pius XII; the Silver Medal of the University of Bordeaux; the Silver Cross of the Greek Royal Order of the Phoenix and the Pasteur Medal of the Pasteur Institute of Paris.

Personal life The experience of the Lawrence Brothers in nuclear medicine became crucial in saving their mother, when she was diagnosed with uterine cancer in 1937. When they were told at Mayo Clinic that she had three months left to live, John Lawrence brought her to be treated by radiologist Dr. Robert S. Stone, one of his collaborators. Stone successfully used high-energy X-rays obtained from an x-ray tube that had been invented by David Sloan, one of the first members of Ernest Lawrence's team at Berkeley. Gunda Lawrence lived about another 15 years after the treatment, until the age of 83. Lawrence was a survivor of the sinking of the SS Athenia in 1939.

References

Biography Radioisotopes and Radiation: Recent Advances in Medicine, Agriculture, and Industry (1969) ISBN 0-486-62301-7 Recent Advances in Nuclear Medicine, Vol. 5 (1978) ISBN 0-8089-1068-X

External links Guide to the John Hundale Lawrence Papers at The Bancroft Library

Illustrations

Worked examples

Example 1 — a first encounter with John H. Lawrence

Start with the simplest possible case. Write down what John H. Lawrence claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to John H. Lawrence before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about John H. Lawrence ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of John H. Lawrence

In research: John H. Lawrence appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses John H. Lawrence in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: John H. Lawrence is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1904 births, 1991 deaths, 20th-century American people, so understanding it makes those chapters shorter.
In everyday life: Look for John H. Lawrence outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “John H. Lawrence” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study John H. Lawrence in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what John H. Lawrence means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain John H. Lawrence out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is John H. Lawrence in simple terms?

John Hundale Lawrence (January 7, 1904 – September 7, 1991) was an American physicist and physician best known for pioneering the field of nuclear medicine. Background John Hundale Lawrence was born in Canton, South Dakota.

Why does John H. Lawrence matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study John H. Lawrence?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on John H. Lawrence.